<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录" />

    <!-- 登录表单 -->
    <van-form ref="loginForm"  @submit="onSubmit">
      <van-field 
      name="mobile" 
      placeholder="请输入手机号" 
      v-model="user.mobile"
      :rules="userFormRules.mobile"
      type= "number"
      maxlength="11"
      > 
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field name="code" 
      placeholder="请输入验证码" 
      v-model="user.code"
      :rules="userFormRules.code"
      type= "number"  
      maxlength="6" 
      >   
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>

          <van-count-down v-if="isCountDownShow" :time="1000*5" format="ss 秒" @finish="isCountDownShow=false" />
          <!-- 发送验证码按钮 -->
          <van-button v-else 
          class="send-sms-btn" 
          native-type="button"
          round size="small" type="default" 
          @click='onSendSms'
          > 发送验证码</van-button>
        </template>
      </van-field> 
      <div class="login-btn-wrap" style="margin: 16px;">
        <van-button class="login-btn" block type="info" native-type="submit">登录</van-button>
      </div>
    </van-form>
    
  </div>
</template>

<script>
import {login , sendSms} from '@/api/user'
export default {
  name: 'Login',
  data () {
    return {
      user:{
        mobile:'', //手机号
        code:''  //验证码
      },

    isCountDownShow: false,

    userFormRules:{
      mobile:[{
        required:true,    //是否必填
        message:'手机号不能为空'
      },{
        pattern:/^1[3|5|7|8]\d{9}$/, //手机号以1 3578 开头 后九位数
        message:'手机号格式错误'
      }],
      code:[{
        required:true,
        message:'验证码不能为空'
      },{
        pattern:/^\d{6}$/,
        message:'验证码格式错误'
      }]
    }
    }
  },
  methods: {
    // 表单提交事件
   async onSubmit () {
      const user = this.user
      //发送请求 A，准备能够请求接口的方法 在src/api/user
      // 引入得到能够发送请求的接口方法 
      // 调用login的方法实现登录操作
       this.$toast.loading({
        message: '登录中...', //页面提示
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认是 2000，如果为 0 则持续展示
      })
      try{
        const res = await login(user)
        console.log(res);
        this.$store.commit('setUser',res.data.data)
        // console.log('登录成功',res);
        this.$toast.success('登录成功')
        this.$router.back()
      } catch(err){
         if(err.response && err.response.status === 400 ){
          // console.log('手机号或验证码错误');
          this.$toast.fail('手机号或验证码错误')
         } else{
          // console.log(err);
           this.$toast.fail('登录失败，请稍后重试')
         }
         
      }
    },
    async onSendSms() {
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch(err){
        console.log(err);
         return console.log('验证失败',err);
      }
      //2.验证通过.显示倒计时
      this.isCountDownShow=true 
  
    //  3.请求发送验证码
     try {
      await sendSms(this.user.mobile)
       this.$store.commit('setUser',data.data)
       this.$toast('发送成功')
      
     } catch(err){
       this.isCountDownShow = false
       console.log(err);
       if(err.response && err.response.status===429){
        this.$toast('发送太频繁了，请稍后再试')
       } else {
        this.$toast('发送失败.请稍后重试')
       }
     }
    }
    
  }
}
</script>

<style lang="less" scoped>
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}

/deep/ .van-button--primary {
  border-color: #1989fa !important;
}
</style>